I was tempted to use them because they look nice and are easy to store - they just stand up and don't have to be blocked by anything. they are also comfortable to use, these curves don't interfere with slicing, but in fact they can make it easier, for example, to throw products into a pot or bowl (they collect pieces and juice).
the only thing that annoys me very much is their texture. they are not smooth, but have tiny bumps arranged in a grid (as you can see on the enlarged first picture). I prefer smooth boards. I don't like to fuck on unevenness with a knife, which is much more valuable than a board.